I'm sorry cpanelkenneth, I don't believe this is what the user was trying to do.
The Index Manager, which allows an administrator to control whether and how "index" or "file lists" are displayed to site visitors if no file is specified and no index.html .php etc file is present.
"File Manager Directory Selection" is a part of the file manager.
Please let me know if somehow the Index Manager switch is located within the File Manager popup.
Thanks.